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By PiThagoras

Tags: Circumference, Circle, pi, radius, diameter


Posted: 2013-09-16
Circumference of a Circle
Circumference of a Circle
$$$C = 2 \pi r = \pi d$$$

"Circumference is the linear distance around the outside of a closed curve or circular object." It can be calculated using the above, where C is the circumference using either the radius (r) or the diameter (d), depending on what's convenient.

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